The reason for breast pain during breastfeeding is still mainly related to lactation, infection, other reasons account for a small part. 1, postpartum worry about lactation less, family members to the maternal over-supplementation, lactation more, the baby is small can not eat so much milk, the accumulation of milk in the breast will appear swelling pain, hard lumps, etc., serious fever will appear, in this case in time with the breast pump to suck out the milk can be. 2. Acute mastitis during breastfeeding is due to nipple injury and bacteria entering the milk ducts with the wound leading to infection. Early detection of local redness, swelling, heat and pain can lead to effective treatment in time to avoid aggravation of the condition, and in severe cases, incision and drainage is required, which can affect the baby’s breastfeeding. 3, poor mood during breastfeeding, many people after childbirth due to changes in hormone levels, coupled with the strain of carrying a child, family structure changes, so often angry, mood swings can also occur breast pain, most of this situation is not accompanied by the local performance of breast swelling, just tingling, and even reduced milk production. Find the cause of breast pain in time, keep your mood relaxed during breastfeeding, match your diet reasonably and don’t strain. If you have pain, actively treat it to avoid affecting your body and your baby’s feeding.